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Diffstat (limited to 'src/nodetypes')
| -rw-r--r-- | src/nodetypes | 147 |
1 files changed, 147 insertions, 0 deletions
diff --git a/src/nodetypes b/src/nodetypes new file mode 100644 index 0000000..60c4a95 --- /dev/null +++ b/src/nodetypes @@ -0,0 +1,147 @@ +# $NetBSD: nodetypes,v 1.11 2002/11/24 22:35:42 christos Exp $ +# Copyright (c) 1991, 1993 +# The Regents of the University of California. All rights reserved. +# +# This code is derived from software contributed to Berkeley by +# Kenneth Almquist. +# +# Redistribution and use in source and binary forms, with or without +# modification, are permitted provided that the following conditions +# are met: +# 1. Redistributions of source code must retain the above copyright +# notice, this list of conditions and the following disclaimer. +# 2. Redistributions in binary form must reproduce the above copyright +# notice, this list of conditions and the following disclaimer in the +# documentation and/or other materials provided with the distribution. +# 3. All advertising materials mentioning features or use of this software +# must display the following acknowledgement: +# This product includes software developed by the University of +# California, Berkeley and its contributors. +# 4. Neither the name of the University nor the names of its contributors +# may be used to endorse or promote products derived from this software +# without specific prior written permission. +# +# THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND +# ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE +# IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE +# ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE +# FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL +# DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS +# OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) +# HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT +# LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY +# OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF +# SUCH DAMAGE. +# +# @(#)nodetypes 8.2 (Berkeley) 5/4/95 + +# This file describes the nodes used in parse trees. Unindented lines +# contain a node type followed by a structure tag. Subsequent indented +# lines specify the fields of the structure. Several node types can share +# the same structure, in which case the fields of the structure should be +# specified only once. +# +# A field of a structure is described by the name of the field followed +# by a type. The currently implemented types are: +# nodeptr - a pointer to a node +# nodelist - a pointer to a list of nodes +# string - a pointer to a nul terminated string +# int - an integer +# other - any type that can be copied by assignment +# temp - a field that doesn't have to be copied when the node is copied +# The last two types should be followed by the text of a C declaration for +# the field. + +NCMD ncmd # a simple command + type int + assign nodeptr # variable assignments + args nodeptr # the arguments + redirect nodeptr # list of file redirections + +NPIPE npipe # a pipeline + type int + backgnd int # set to run pipeline in background + cmdlist nodelist # the commands in the pipeline + +NREDIR nredir # redirection (of a complex command) + type int + n nodeptr # the command + redirect nodeptr # list of file redirections + +NBACKGND nredir # run command in background +NSUBSHELL nredir # run command in a subshell + +NAND nbinary # the && operator +NOR nbinary # the || operator + +NSEMI nbinary # two commands separated by a semicolon + type int + ch1 nodeptr # the first child + ch2 nodeptr # the second child + +NIF nif # the if statement. Elif clauses are handled + type int # using multiple if nodes. + test nodeptr # if test + ifpart nodeptr # then ifpart + elsepart nodeptr # else elsepart + +NWHILE nbinary # the while statement. First child is the test +NUNTIL nbinary # the until statement + +NFOR nfor # the for statement + type int + args nodeptr # for var in args + body nodeptr # do body; done + var string # the for variable + +NCASE ncase # a case statement + type int + expr nodeptr # the word to switch on + cases nodeptr # the list of cases (NCLIST nodes) + +NCLIST nclist # a case + type int + next nodeptr # the next case in list + pattern nodeptr # list of patterns for this case + body nodeptr # code to execute for this case + + +NDEFUN narg # define a function. The "next" field contains + # the body of the function. + +NARG narg # represents a word + type int + next nodeptr # next word in list + text string # the text of the word + backquote nodelist # list of commands in back quotes + +NTO nfile # fd> fname +NCLOBBER nfile # fd>| fname +NFROM nfile # fd< fname +NFROMTO nfile # fd<> fname +NAPPEND nfile # fd>> fname + type int + next nodeptr # next redirection in list + fd int # file descriptor being redirected + fname nodeptr # file name, in a NARG node + expfname temp char *expfname # actual file name + +NTOFD ndup # fd<&dupfd +NFROMFD ndup # fd>&dupfd + type int + next nodeptr # next redirection in list + fd int # file descriptor being redirected + dupfd int # file descriptor to duplicate + vname nodeptr # file name if fd>&$var + + +NHERE nhere # fd<<\! +NXHERE nhere # fd<<! + type int + next nodeptr # next redirection in list + fd int # file descriptor being redirected + doc nodeptr # input to command (NARG node) + +NNOT nnot # ! command (actually pipeline) + type int + com nodeptr |